Marine biological survey to establish the distribution and status of ...

More documents

Recommendations

Info

Figure 16 Division of the megafaunal burrowed mud habitat in the Sound of Canna into the infaunal biotopes SS.SSa.OSa.OfusAfil and SS.SMu.CSaMu.AfilMysAnit © Crown Copyright and database right [2012]. All rights reserved. Ordnance survey License number 100017908. This product has been derived in part from material obtained from the UK Hydrographic Office with the permission of the Controller of Her Majesty's Stationery Office and UK Hydrographic Office (www.ukho.gov.uk). NOT TO BE USED FOR NAVIGATION Figure 17 Particle size analysis of the SS.SSa.OSa.OfusAfil sediment samples, showing the percentage of each sediment category 60 Particle Size Analysis of OfusAfil sediments 50 40 30 20 10 0 Medium pebble (gravel) Small pebble (gravel) Granule Sand - very coarse Sand - coarse Sand - medium Sand - fine Sand - very fine Silt & Clay G02 G03 G05 G10 G12 G13 G20 27
The second biotope SS.SMu.CSaMu.AfilMysAnit was found in slightly muddier sediments (Figure 18) and was species rich and diverse (total taxa 245, mean taxa 59, mean H’ 3.4). It was characterised by large numbers of the brittlestars Amphiura filiformis and Amphiura chiajei, the bivalve Abra nitida, and polychaetes including Notomastus latericeus, Lumbrineris gracilis, Spiophanes kroyeri, Diplocirrus glaucus and Galthowenia oculata. Figure 18 Particle size analysis of the SS.SMu.CSaMu.AfilMysAnit sediment samples, showing the percentage of each sediment category 60 50 40 30 20 10 Particle Size Analysis of AfilMysAnit sediments 0 Medium pebble (gravel) Small pebble (gravel) Granule Sand - very coarse Sand - coarse Sand - medium Sand - fine Sand - very fine Silt & Clay G01 G04 G06 G07 G08 G09 G11 G14 G15 G17 G18 G19 3.2.2 Kelp and seaweed communities on sublittoral sediment The following component biotopes of the kelp and seaweed communities on sublittoral sediment MPA search feature (SS.SMp.KSwSS) were recorded in 2010: Laminaria saccharina and red seaweeds on infralittoral sediments SS.SMp.KSwSS.LsacR Laminaria saccharina and robust red algae on infralittoral gravel and pebbles SS.SMp.KSwSS.LsacR.Gv Distribution Description Depth range: 4 - 23 m Total area: 84 ha Kelp and seaweed communities on sublittoral sediment were recorded from the shallow shelf of sand, muddy sand and gravel along the east side of Canna and the north of Sanday, and also from the sediment channel behind the skerry of Sgeir a’Phuirt (Figure 19). The seabed in Kilmory Bay on Rum supported similar algal communities on muddy sand as did patches of sand in the embayment to the west of Sanday, although this area had a greater proportion of boulder and bedrock. Several biotopes were recorded from or adjacent to the infralittoral sediment with the most widely distributed being characterised by sugar kelp Laminaria saccharina (Saccharina latissima) plants and scattered red algae (SS.SMp.KSwSS.LsacR). At dive Site 7 this community was encountered on coarser gravelly substrates (SS.SMp.KSwSS.LsacR.Gv). 28
Page 1 and 2: Scottish Natural Heritage Commissio
Page 4 and 5: COMMISSIONED REPORT Summary Marine
Page 6 and 7: Contents Page no. 1 Introduction ..
Page 8 and 9: Page no. Figure 28 Basking shark ho
Page 10 and 11: 1 INTRODUCTION 1.1 Background The S
Page 12 and 13: Rum has a far more complex structur
Page 14 and 15: In 1993 an SNH team conducted remot
Page 16 and 17: Richardson et al. (2004) showed tha
Page 18 and 19: 2 METHODS 2.1 Sampling strategy The
Page 20 and 21: Figure 6 Shallow water video statio
Page 22 and 23: Figure 8 Video stations surveyed in
Page 24 and 25: Each discrete grab sample was empti
Page 26 and 27: Following the survey, the infauna w
Page 28 and 29: Table 2 Biotopes identified in the
Page 30 and 31: Figure 11 2010 survey coverage off
Page 32 and 33: Circalittoral sandy mud (SS.SMu.CSa
Page 34 and 35: Description The distribution of the
Page 38 and 39: Some L. saccharina forest (IR.LIR.K
Page 40 and 41: Rhodophyllis werneri and Scinaia in
Page 42 and 43: Plate 8 A northern sea fan Swiftia
Page 44 and 45: Zostera marina/angustifolia beds on
Page 46 and 47: This is consistent with infaunal co
Page 48 and 49: the fan mussels ranged from an esti
Page 50 and 51: Plate 13 A small basking shark in C
Page 52 and 53: Distribution Depth range: 72 - 21
Page 54 and 55: Figure 31 Other species of interest
Page 56 and 57: coverage predictive biotope distrib
Page 58 and 59: 4 DISCUSSION This section presents
Page 60 and 61: Table 4 Summary of the assessment o
Page 62 and 63: The burrowed mud supported langoust
Page 64 and 65: in areas where it is protected from
Page 66 and 67: Table 6 Summary of a preliminary as
Page 68 and 69: 5.2 Future data review and biologic
Page 70 and 71: Ingle, R.W. (1996). Shallow-water c
Page 72 and 73: Appendix 1 Drop-down video and dive
Page 74 and 75: Date Station Time Latitude Longitud
Page 86 and 87:
Date Station Time Latitude Longitud
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Table A1.2 Summary notes (biologica
Page 106 and 107:
Tow Id no Tow Data point Date Tape
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Tow Id no Tow Data point Date A123
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Table A1.3 Summary of sampling unde
Page 122 and 123:
Site No. Date Habitat Id (Site No:H
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Species MCS Code D D 1 _ 2 D D 1 _
Page 130 and 131:
Species MCS Code Suberites ficus C2
Page 132 and 133:
Species MCS Code Cryptopleura ramos
Page 134 and 135:
Species MCS Code Scrupocellaria Y83
Page 136 and 137:
Table A1.6 Species recorded (matrix
Page 138 and 139:
Species MCS Code A 1 2 _ 1 A 1 2 _
Page 140 and 141:
Table A1.7 Species recorded (matrix
Page 142 and 143:
Species MCS Code Dive 1.1 Dive 2.1
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Table A2.1 Positional and depth inf
Page 150 and 151:
Table A2.3 List of taxa identified
Page 152 and 153:
Taxa MCS Code G 01 G 02 G 03 G 04 G
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Taxa MCS Code G 01 G 02 G 03 Diasty
Page 160 and 161:
Page 162 and 163:
Taxa MCS Code G 01 Ascidiella sp. Z
Page 164 and 165:
Figure A2.1 Bray-Curtis similarity
Page 166 and 167:
Appendix 3 Macrofaunal and sediment
Page 168 and 169:
Table A3.3 Results of univariate an
Page 170 and 171:
Appendix 4 Photo and video logs - 2
Page 172 and 173:
File Name Subject Site Name Island
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Table A4.2 Drop-down video log, 201
Page 182 and 183:
File Name File size Folder Site No
Page 184 and 185:
File Name File size Folder Site No
Page 186:
www.snh.gov.uk © Scottish Natural
show all

Marine biological survey to establish the distribution and status of ...

Create successful ePaper yourself

Delete template?

Save as template?